Mature Size: 40-45′ x 15-20′ USDA Hardiness Zone: 6-10 (View Hardiness Zone Map) Outstanding Characteristics: Hardy evergreen Bay Magnolia with an upright growth habit, long lime green foliage (4-6″) that is silver on the back (nice contrast in a breeze), creamy summer flower, red fall fruit. Notes: Evergreen throughout the year, drops foliage in the spring as new buds break.